My horrid memory
I'm currently 6% Swedish but I feel like tomorrow I'll remember nothing
It sounds like you're discouraged because you've reached level 2 and what you've seen hasn't stuck. You're not behind the curve. Level 2 is nowhere near enough exposure to Swedish to have built familiarity. And, that's what it's going to take to learn a language, lots of exposure so you're not at the point of trying to memorize things, you've become so familiar with them that they might as well be a best friends.
Best friends become best friends because we have spent a lot of time getting to know them. We discover things we like about them. We've learned what they are like in different situations. If they are sad or grumpy we already know if they want us to sit next to them or leave them alone. Learning a language is like spending so much time studying and reviewing it, that it becomes your best friend. So, don't get discouraged. You've barely been exposed to the words you've already seen in your course for it even to count as having asked for their name.
How do you know when you're becoming friends with Swedish? You start to get a gut feeling about which word is the "right" or "wrong" word to use in a sentence. Or, which conjugation is right. Memorization is pulling up a file in your mind and finding the word you want and plugging it in. Familiarity on the other hand really feels like it comes from your gut instinct. And the better your friendship with the language, the more often you'll rely on your gut instead of memorization.
I hope this analogy made sense. Basically, you've just barely started. I don't expect you to remember anything the next day. Don't give up. It'll start to sink in once you've seen the same sentence 25 times all mixed in between seeing other sentences 25 times. And, after you haven't seen that sentence for a week, you'll still forget it. So, you'll want to see it another 25 times mixed in with the other sentences. :)
It took me a long time to memorize Hiragana, (Japanese) Keep practicing! Swedish is pretty easy, and much easier than Japanese. You will remember some of it by tomorrow. Continue to practice and don't get discouraged!
I recommend to use flashcards programs like Anki, a spaced repetition software (Memrise is another useful program). It is a fun and an efficient way to learn new words. Tinycards from Duolingo is another option. Try also to create mnemonics with the words you have more difficulties. Example: Pojke - boy; create the image in your mind that the boys in Sweden like to play Poker; basically you are creating one mental association between the word Pojke and the word boy. Sometimes, it takes time to come with a good association but after you find one, you will be able to remember the word for a long time.